Level Streaming and NavMeshes? Having Trouble

I am having trouble getting my AI to move in a sublevel. According to this video, it sounds like it’s possible to get the nav mesh to work by being in a sublevel instead of the persistent level Getting Started with Level Streaming | Live Training | Unreal Engine - YouTube. I’d prefer it this way so everything is easier to manage, I’d imagine this would save some resources too on a large scale game.

How do I go about getting my navmesh to work in sub-levels that are pushed in?